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A fluorescent wheel and two-color laser light source

A fluorescent wheel and blue laser technology, which is applied in the field of fluorescent wheels and two-color laser light sources, can solve the problems of unfavorable miniaturization of laser projection equipment, large light source volume, complex optical structure design of two-color laser light sources, etc., and achieve the goal of improving light processing efficiency Effect

Active Publication Date: 2019-02-22
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a fluorescent wheel and a two-color laser light source. By setting a diffusion layer corresponding to at least the transmission area on the surface of the fluorescent wheel, the fluorescent wheel can sequentially output laser light and fluorescent light, and at the same time diffuse the laser light to form a dispersive spot. The function of omitting the separate speckle dissipation parts improves the light processing efficiency of the fluorescent wheel, and also solves the technical problems of the complex design of the optical structure of the two-color laser light source and the large volume of the light source, which is not conducive to the miniaturization of laser projection equipment.

Method used

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  • A fluorescent wheel and two-color laser light source
  • A fluorescent wheel and two-color laser light source
  • A fluorescent wheel and two-color laser light source

Examples

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Effect test

Embodiment 1

[0049] Embodiment 1 of the present invention provides a fluorescent wheel, driven by a motor to rotate, such as image 3As shown, the fluorescent wheel 3 is in the shape of a disc, including a fluorescent area 31 and a transmission area 32. Since fluorescence excitation only requires a small spot, the fluorescence is only distributed in the upper area of ​​the fluorescent wheel disc. Usually, the fluorescent area and the transmission area Set on the outer circumference area of ​​the fluorescent wheel. The fluorescent area 31 is provided with fluorescent powder for being excited by laser excitation light to emit fluorescent light. Among them, such as Figure 6 As shown in the schematic cross-sectional view of the fluorescent wheel, the fluorescent area 31 includes a fluorescent area 311 and a coating layer 312 on the surface of the fluorescent area 311 . The transmission area 32 is not provided with phosphor powder, and is usually made of transparent glass material, which is ...

Embodiment 2

[0062] Embodiment 2 of the present invention is a specific implementation based on Embodiment 1, and the same parts will not be described again. The difference is that the above-mentioned first laser may be a red laser, and the second laser may be a blue laser. The blue laser has a short wavelength and is usually used as laser excitation light to excite phosphors to produce fluorescence with longer wavelengths.

[0063] Since the human eye is sensitive to the speckle images formed by different color lasers, for example, the human eye is more sensitive to the speckle of the red laser than to the blue laser. The degree of speckle dissipation of the red laser.

[0064] To achieve this purpose, in the embodiment of the present invention, the light divergence angle of the first laser diffusion area, that is, the red laser diffusion area, is larger than the light divergence angle of the second laser diffusion area, that is, the blue laser diffusion area.

[0065] In application, al...

Embodiment 3

[0071] Embodiment 3 of the present invention is a modification based on Embodiment 1 or Embodiment 2, and the content of the same parts as Embodiment 1 or Embodiment 2 will not be repeated here.

[0072]The difference from Embodiment 1 and Embodiment 2 is that, in addition to corresponding to the transmission region 32, the diffusion layer 33 is also arranged corresponding to the fluorescent region 31, wherein, the area where the diffusion layer 33 is arranged corresponding to the fluorescent region 31 has a great influence on the divergence of light. The angle is smaller than the divergence angle of the light in the region where the diffusion layer 33 and the transmissive region 32 are arranged correspondingly. Here, the region of the diffusion layer corresponding to the fluorescent region has relatively weak divergence of the laser excitation light, which mainly serves to homogenize the laser excitation light beam.

[0073] Since the fluorescent area and the transmissive are...

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Abstract

The invention discloses a fluorescent wheel which comprises a fluorescent area and a transmission area, wherein the transmission area is used for respectively transmitting a first laser and a second laser; a diffusion layer is arranged on the surface of the fluorescent wheel; the diffusion layer at least corresponds to the transmission area and is used for respectively diffusing the first laser and the second laser before the first laser and the second laser reach the transmission area, so that a function of eliminating spot is achieved while the laser is transmitted and an independent spot eliminating component is avoided. The invention also provides a bicolor laser light source using the fluorescent wheel; the bicolor laser can be subjected to spot elimination; the use of the optical components is reduced; the complexity of an optical frame of the bicolor laser light source is reduced; and the miniaturization of the laser projection equipment is benefited.

Description

technical field [0001] The invention relates to the field of laser lighting and display, in particular to a fluorescent wheel and a two-color laser light source. Background technique [0002] Laser is a light source with high brightness, strong directionality, and monochromatic coherent light beam. Due to its many advantages, it has been gradually used as a light source in the field of projection display technology in recent years. However, the speckle problem of pure laser light sources is serious and the cost is high. At present, laser light sources mixed with fluorescence and laser are widely used. [0003] Among them, the fluorescence is generated by coating phosphor powder on the wavelength conversion device and exciting the phosphor powder with laser light. For example, a blue laser is used to excite green and red phosphors to generate three primary colors of light. The green phosphor and the red phosphor wheel are coated on a rotating wavelength conversion device, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/2033G03B21/204G03B21/206
Inventor 田有良王强刘显荣李巍
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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